Audioscan Verifit - Manual (Page 44)

Verifit ® User's Guide Version 3.12  May 2015
inside of the coupler opening. Putty should not extend into the coupler cavity or block the sound outlet of
the instrument. Vents should be sealed at the faceplate end. It is very important that the instrument be well-
sealed to the coupler.
Open fit instruments may not be verified using Test box speechmap.
RITE (Receiver in the ear) instruments are coupled to the HA-1 coupler using putty to seal the receiver
module or soft tip to the coupler opening.
Excess low frequency output is usually due to open vents or a poor seal to the coupler.
For health reasons, hearing instruments and earmolds should be clean before putty is applied and putty
should be replaced frequently.
Positioning the hearing instrument
1. The hearing instrument should be coupled to the appropriate coupler and a battery or battery pill installed.
See Coupling the hearing instrument and Battery pill use and care.
2. Place the instrument and coupler in the test chamber so that the microphone opening(s) of the instrument are
on the crossbar within the test zone.>>
3. For directional instruments, the direction of maximum sensitivity should be oriented toward the left speaker.
See Directional ITE positioning and Directional BTE positioning for special positioning considerations for
the directional test.
4. Position the test box reference microphone as close as possible to the (front-facing) microphone opening of
the hearing instrument without touching it.
5. Close and seal the test chamber.
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